.el-header {
    padding: 0 0px;
    box-sizing: border-box;
    flex-shrink: 0;
}
.el-menu--horizontal>.el-menu-item {
    float: left;
    height: 50px;
    margin: 0px;
    border-bottom: 2px solid transparent;
    color: #909399;
    text-align: center;
    overflow: hidden;
    text-align: center;
    line-height: 55px
}